کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9829542 | 1524494 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication and photoluminescence of highly crystalline GaN and GaN:Mg nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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![عکس صفحه اول مقاله: Fabrication and photoluminescence of highly crystalline GaN and GaN:Mg nanoparticles Fabrication and photoluminescence of highly crystalline GaN and GaN:Mg nanoparticles](/preview/png/9829542.png)
چکیده انگلیسی
Well-dispersed nano-sized gallium nitride (GaN) and magnesium-doped GaN (GaN:Mg) particles were successfully prepared from nano-sized gallium oxide (Ga2O3) particles under a flow of ammonia gas. The gallium oxide nanoparticles were prepared from mixtures of gallium nitrate aqueous solution and ammonia solution that were heated to between 600 and 800 °C. Addition of a proportional amount of ammonia into the solution is a key point for production of well-dispersed nano-sized gallium oxide particles. Gallium oxide nanoparticles less than 20 nm in size were obtained when using an NH3 to Ga(NO3)3 ratio of 1:1 (mol/mol) with a heating temperature of 800 °C. Nitridation of gallium oxide nanoparticles under a flow of ammonia at a heating temperature of 800 °C resulted in nano-sized GaN particles less than 40 nm in size. We investigated the effects of preparation conditions such as solution composition and operating temperature on the characteristics of gallium nitride particles. This method allows simple doping of GaN with alkali earth metals. It was shown that the doping with magnesium resulted in intense blue luminescence from particles when UV excitation at 254 nm was used.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 281, Issues 2â4, 1 August 2005, Pages 234-241
Journal: Journal of Crystal Growth - Volume 281, Issues 2â4, 1 August 2005, Pages 234-241
نویسندگان
Takashi Ogi, Yoshifumi Itoh, Mikrajuddin Abdullah, Ferry Iskandar, Yasushi Azuma, Kikuo Okuyama,